1265653310042 has 16 divisors (see below), whose sum is σ = 2091176523072. Its totient is φ = 569711550720.

The previous prime is 1265653310041. The next prime is 1265653310099. The reversal of 1265653310042 is 2400133565621.

It is a junction number, because it is equal to n+sod(n) for n = 1265653309978 and 1265653310005.

It is not an unprimeable number, because it can be changed into a prime (1265653310041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279268103 + ... + 279272634.

It is an arithmetic number, because the mean of its divisors is an integer number (130698532692).

Almost surely, 2^{1265653310042} is an apocalyptic number.

1265653310042 is a deficient number, since it is larger than the sum of its proper divisors (825523213030).

1265653310042 is a wasteful number, since it uses less digits than its factorization.

1265653310042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558540853.

The product of its (nonzero) digits is 129600, while the sum is 38.

Adding to 1265653310042 its reverse (2400133565621), we get a palindrome (3665786875663).

The spelling of 1265653310042 in words is "one trillion, two hundred sixty-five billion, six hundred fifty-three million, three hundred ten thousand, forty-two".